GE Legend IP, User Manual

Page: 107 / 140

Chapter 6
System operation
99
Autopan limitations
When setting autopan limits, be aware that you must set both the right and left limit in the same tilt hemisphere.
You can set them in either tilt hemisphere, but you cannot cross tilt hemispheres, meaning that you cannot pass
the bottommost point or turn the camera upside down. Allowing the camera to E-flip will create an invalid set
of autopan limits that may cause unexpected camera performance. See
Speeds/Tracking page on page 89.
Remember that there is a positive and a negative hemisphere. Depending on what coordinates you selected
under
Setup | Preferences | Coordinates , the positive hemisphere will be identified by a tilt position of
0° to 90° or +90° to 0°.
Figure 76. No E-flip with autopan limits
Pan and tilt limitations
The pan and tilt limits are programmable stops for the dome’s camera. These are the highest, lowest, rightmost,
and leftmost points that the camera will pan and tilt to. By default, the pan and tilt limits are off. Programming
them turns them on. When setting the pan and tilt limits, be aware of the following limitations.
• Hourglassing behavior : The dome prevents any hourglassing behavior by restricting the tilt limit to
90°, when necessary, to accommodate some pan limits set to less than 180°. To avoid setting tilt limits
too tightly, we recommend that you set the pan limits first, then set the tilt limits.
• E-flip constraint : If E-flip (see Speeds/Tracking page on page 89) is enabled (checkbox checked),
constraints are placed upon the tilt limits. See Table 10 on page 100 for constraints.
To review the pan and tilt coordinate options, see Coordinates page on page 44.
90°
(0°)
0°
(+90°)
180°
(-90°)
Positive (+)
hemisphere
Negative (-)
hemisphere
-fli
Legend
Legend
No E-flip allowed
with autopan limits
90°
( 0° )
Negative (-)
hemisphere Positive (+)
hemisphere
180°
(-9 0° )
0°
(+9 0° )